The Synology DS420+ packs four bays into a compact desktop chassis

Four drive bays, no expansion ports, small footprint. The DS420+ is a 4-bay that stays a 4-bay — Synology’s way of keeping the price down and the form factor tidy. It’s a capable home-office NAS for RAID 5 or RAID 10 setups, just don’t expect to daisy-chain more storage later.